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Note 18 Changes in other intangible assets (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Other intangible assets [Line Items]      
Other intangible assets € 1,379 € 1,435  
Other intangible assets 1,449 1,379 € 1,435
Computer software [member]      
Other intangible assets [Line Items]      
Other intangible assets 1,239 1,202 1,598
Additions other than through business combinations, intangible assets other than goodwill 592 470 452
Amortisation, intangible assets other than goodwill (490) (446) (448)
Amortization transfer to discontinued operations [1] 0 0 (77)
Increase (decrease) through net exchange differences, intangible assets and goodwill 80 29 (38)
Impairment (25) (15) (6)
Decreases by companies held for sale other intangible assets [1] 0 0 (279)
Other intangible assets 1,396 1,239 1,202
Other intangible assets [member]      
Other intangible assets [Line Items]      
Other intangible assets 140 233 412
Additions other than through business combinations, intangible assets other than goodwill 0 0 8
Amortisation, intangible assets other than goodwill (20) (48) (59)
Amortization transfer to discontinued operations [1] 0 0 (3)
Increase (decrease) through net exchange differences, intangible assets and goodwill (63) (45) (91)
Impairment 0 0 0
Decreases by companies held for sale other intangible assets [1] 0 0 (34)
Other intangible assets 56 140 233
Total of intangible assets [Member]      
Other intangible assets [Line Items]      
Other intangible assets 1,379 1,435 2,010
Additions other than through business combinations, intangible assets other than goodwill 592 470 460
Amortisation, intangible assets other than goodwill (510) (494) (507)
Amortization transfer to discontinued operations [1] 0 0 (80)
Increase (decrease) through net exchange differences, intangible assets and goodwill 17 (16) (129)
Impairment (25) (15) (6)
Decreases by companies held for sale other intangible assets [1] 0 0 (313)
Other intangible assets € 1,453 € 1,379 € 1,435
[1] (1) Amount is mainly due to the companies in the United States included in the USA Sale (see Notes 3 and 21).